Which battery would you buy?

Geo-TH,In

Well-known Member
Which battery would you use to power up a 12v electric powered hydraulic pump? According to international hydraulics, the pump will draw a max 250 amps under max pressure. Pump may be used for 30 seconds at a time, then recharged by turck for up to an hour before dumping again.

I don't need a battery that can withstand extreme bouncing like you would have in a bass boat going 50 mph on a choppy lake. There wouldn't be more bouncing than a truck battery would experince.

The truck battery comes with a 12 month free replacement 60 month prorated. Marine battery comes with 3 month free replacement and 12 month. Warranty on marine battery is almost like a mower or motorcycle battery.

Please ingore the fact these are Rural King excide batteries. I really don't care, I've been using excides from Rural King for years. Please focus on just answering my question. Please give me your reason for selecting one over the other.

Thank you very much.
geo
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I would go with the deep cycle for heavier plates and longer run times. But then again I'm cheep I would use an old battery and get a new one for my vehicle. CCA doesn't really matter for your application.
 
I would purchase the 93-60 The warrantee does not state what it is used for, The operating cycle you state with 250 amps max, and intermittent duty, not continuous draw, and probably staying near full charge, would make the choice easy for me. Jim
 
For that application what I would do is take whatever vehicle had a battery a few years old and put in a new one then put that battery in the trailer. Usually if possible my cars and trucks have newest batteries and the old ones go in tractors etc where when they die it's not as big of a deal leaving me stranded hundred miles from home like a truck could
 
I won't ignore the fact there rural king batteries. There's nothing wrong with there batteries. I just went there today and bought 4. Two of them were 9 year olds out of dads 4020. My 8430 has 2 that I bought there in 06 and it started just fine this fall.
 
A deep cycle battery would be the ideal battery to use, but either will get the job done for occasional use. I agree with putting a brand new battery in a vehicle and moving a usable used battery to the trailer. Occasional recharging and keeping an inexpensive solar charger on the battery should keep the trailer battery in good condition.
 
If it eventually going belly up on you won't leave you stranded, +1 on swapping out the automotive battery (new for your truck and the older one for your pump).

the deep cycle (by my understanding) is designed to hold a charge longer and handle deeper discharg/recharge cycles than the standard car batt. You'll also not be needing those 800 odd cranking amps on the pump.
 

I would go with the marine battery - better suited for longer pull downs. The warranty is interesting. Perhaps they don't want to cover batterys that sat in a boat all winter without be charged.

I have had good luck with marine batterys.
 
What many of you are saying about using old truck battery and buying a new truck battery is making a lot of sense and something I never considered. I'm going to try using old battery to see if it will work. Also look at date on truck battery and measure the room temp cranking amps. I think old battery is at least 5 years old. Don't think the big truck battery in pic will even fit in my truck. I may look at a bigger battery for truck, so in the future, I may make the trade again and put a bigger battery in trailer. THANKS A MILLION.
Geo.
 
4520,
I buy only excide batteries, some at Rural King. Menards is the only place I can buy my favoirte 350 cca sealed excide mower battery. I currently have about 6 sealed mower batteries and only plan to buy the sealed cutting edge excide mower batteries in the future.

I just didn't want this post to go like my Made in America post turned into a hate rant against menards, few answered my question. geo
 
Thanks to all for your ideas. Got it figured out.

I'm Leaning towards replacing battery in car. Then put the best battery in truck. Worst battery in trailer. I use truck mostly for in town. Use car for long distance trips and the car is the last thing I would want to get stranded in, hundreds form Terre Haute on an Interstate in the middle of no where. Rural King and Menards are the only two places I consider buying excide batteries from. This week Menards has 11% rebate. Plan to pick up a dead core battery from my garage and go shopping for the best deal.

THANKS TO ALL FOR YOUR COMMENTS.
geo.
 
This may help. Marine deep cycle batteries used to be made with thick plates to tolerate numerous deep cycles and not fracture, which assists in long life under heavy pounding applications. Problem is for a given size battery if you fatten the plates you have to reduce the count so the total surface area is reduced and so is the max current supplied for a certain time at a certain voltage.

In today's market they have done things, probably added fiberglass mesh spacers between plates to support them so that you can get away with more thin plates and get the cranking amps back up and have the deep cycle element too....which you don't need for your application..

This may help: http://www.autobatteries.com/en-us/how-to-choose-your-car-battery-replacement/battery-applications. Problem I have is the voltage of 7.2 volts as starting terminal voltage used as the metric for the CCA test. I don't know about you but I don't have any starters that will wind up at 7.2v (at the starter)...maybe one would slowly continue if started above 10v but not start off.

In your case for the marine you would have available 750 amps at 7.2 volts min for 30 seconds. Not sure of the slope of the discharge cycle of a lead acid battery but assuming it is a linear function let's play with some numbers:

You want 250A max for 30 seconds and let's assume an average voltage (12.75 - 7.2)/2 for a voltage of about 10v. 250A is ⅓ of the 150 CCA rating. 10v at the battery terminals with the motor running as the voltage drops with the battery supplying ⅓ of the specified capacity should do nicely. Considering a linear voltage drop and only using ⅓ of the "fresh battery" rating your battery terminal voltage wouldn't even drop to 10v.

There are curves on deep cycle batteries as to how far down and how many times the battery will tolerate the deep cycling. The shorter the discharges and immediate recharges, the less effect the cycling has on battery life....per the charts I have seen. I would consider a MAX of ⅓ capacity as a mild discharge, especially with the immediate recharge.

The marine posts both and has a good warranty; the truck lacks in posted reserve minutes and warranty. I'd go with the marine.
 

Texasmark1,

Well stated. The orginal question was which battery to use for the application, which you talked to.

It seems to have gotten side tracked to how to best use old batterys. For me a normal start is more like 5 seconds, so 30 seconds is a long pull in my book. Using a weak battery in this application will force the motor to operate under low voltage conditions.
 
Don't know if it matters in your case, but I noticed that the battery terminals are reversed. I ran into this problem a while back. I bought a battery thinking it would work (right dimensions and good cold cranking amps) only to find out that the positive and negative terminals were reversed. There wasn't enough cable to make it work so I ended up getting the more expensive one on the shelf anyways.
 

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